Tangerine (or Blutorange as it was called in Germany, "blood orange") is a much more orange color than I am seeing in the photos. Then again, color reproduction can be a chancy sort of thing, so it could have been...
It looks like the best approximation to what I see in the colors that was available for 1972 was "Bahia Red".
Availability info taken from Jeff Bowlsby's
Paint and Fabrics page, part of his
amazing 914 Classic website.
--DD